In the fourth year of Zhenguan, Tang Jian sent an envoy to the Turks to paralyze Jie Li, and Li Jing secretly gathered elite troops to prepare for a surprise attack on Yinshan. Li Rang, a modern young man, traveled through time and became a soldier in the mission, becoming an outcast bait that no one cared about. Foreseeing the tragic outcome of everyone being killed in battle, he relied on the wisdom of later generations to break through the situation step by step, and changed his destiny to make great achievements.